High-frequency apparatus.



W. DUBILIER. HIGH FREQUENCY APPARATUS.

4 APPLICATION FILED NOV. 21, 1910. 1,023,135. Patented Apr. 16, 1912.

2 E Z (211 501142130 z WILLIAM DUBILIER, OF SEATTLE, WASHINGTON.

HIGH-FREQUENCY APPARATUS.

Specification of Letters Patent.

Patented Apr. 16, 1912.

Application filed November 21, 1910. Serial 110,593,365.

To all whom it may concern;

Be it known that I, WILLIAM DUBILIER, of Seattle, in the county of King, and in the State of Washington, have invented a certain new I and useful Improvement in High-Frequency Apparatus, and do hereby declare that the following isa full, clear,

and exact description thereof.

The object of my invention has been to provide an apparatus for producing hlghfrequency oscillations and particularly. such an apparatus which shall be capable of use in a wireless telephone, and which shall have, among others, the following advantages: That it shall be exceedingly compact; that it shall be simple; that it shall be inexpensive, and that it shall be highly efiicient. 1 I

To such ends my invention consists in the high frequencyapparatus hereinafter specified.

My invention is capable of embodiment in many different forms, but I have chosen to illustrate it in the form shown in the accompanying drawings, which is the best embodiment known to me. Such embodiment, however, is to be regarded only as typical of many possible embodiments.

In the accompanying drawings, Figure 1 is a diagrammatic view of the embodiment of my apparatus which -I have chosen for illustration; Fig. 2 is a vertical sectional. view of the lamp used with such apparatus; Fig. 3 is a plan view of the transformer and condenser of Fig. 1, and Fig. at is a perspective view of the complete apparatus showing the cover of the case raised to expose the interior thereof.

As shown in the diagram in Fig. 1, constant current is generated -by a source of current Ayand is delivered to the electrodes B and C of an arc lamp. The usual selfinduction coils D and E are provided to prevent the passage of alternating current over the direct current circuit, so as to short-circuit the lamp. Anoscillating circuit is provided, comprising a wire F connected with a terminal of the lamp and with a capacity. G, a wire H connecting said capacity with the primary I of a transformer, later to be described, and a wire I connecting the opposite end of said primary with the opposite electrode of the lamp. Thus far described, the invention does not differ from the prior art. The lamp which. is shown in section in Fig. 2, comprises a hollow electrode 'B of any ,suitable conductive material, and an electrode B within said hollow electrode. The electrode B is clamped in a sleeve K, as by a. screw is. The sleeve is secured on a rod L, that is mounted in a threaded sleeve M, the latter belng threaded into a bushing N. The bushingconslsts of a disk n, a sleeve n and a disk at, screwed on the sleeve, the said disks clamp ng between them insulating material 0, which 1s placed'on opposite sides of and against a disk P screwed to the open end of the hollow electrode. A hand-wheel Q. is secured to the sleeve M, so that the latter may be adjusted up and down in the bushing. A collar R is secured to the upper end of the rod L, and a spring S is interposed between said collar and the hand-wheel, so

that it tends to draw the sleeve K against the lower end of the sleeve M. By this arrangement, the electrode B can be adjusted the proper distance from the closed endof the electrode C, by turning the hand-wheel, and the arc can then be started by simply depressing the rod L. Upon. releasing the said rod,-the spring will raise the electrode B, so that the proper degree of separation will automatically occur between the electrodes. The hollow electrode is provided with a pipe T, through which gas may be introduced or a mixture of gas and air, and with an escape U for the products of combustion, thus enabling an atmosphere of hydro-carbon or other gas to be provided, in which a high-frequency arc may be to transmit the oscillations to an aerial V. In the said aerial are two secondaries W and X respectively, which, in cooperation with the said primary are adapted to transmit the oscillations from the said oscillating circuit BFGHIG into the aerial. As shown in Fig. 4, the secondaries W and X are wound on opposite sides of the primary, and I am thus enabled to use substantially all of the flux produced by the primary, both inside and outside of the solenoid, and to transmit an unusually large percentage of the energy generated in the oscillating circuit.

In order to secure compactness, I preferably use a condenser G, consisting of metal interposed between strips of insulating material and rolled into cylindrical form, the cylinder thus formed being of small enough "diameter so that it can go within the coils of the transformer. I

In order to adapt the described apparatus 7 for the transmission of speech, a telephone transmitter may be associated with it in any manner which will cause the electro-magnetic waves which are emitted to be imfluenced to correspond with the sound waves. I have found that I canaccom lish this in an exceedingly simple and eflicient manner and without the use of any separate source of energy as-in a relay circuit by short- 1 circuiting a part of the circuit of the ap paratus; as, one or more turns of one of the transformer coils through a transmitter.

v V For instance, as shown in Fig. 1, I have connected a transmitter Z with the ground end without departing from the'spirit of my Y invention. 1

A of the aerial A and with the coil W of =thegsecondary at a point intermediate its.

ends; I preferably make the connection between .the receiver andthe secondary ad- 1 justable so as to be able to get the bestefi'ect While I, have described my invention above in detail, I 'wish it to be understood that many-changes may be made therein Iclaimz- 1. .In a wireless telephone'apparatus,

. and a plurality of secondarycoils inseries and upon opposite sides of said primary combination of means forproducing electric 3.' Iii awirelesstelephone apparatus, the

oscillations, -means for varying said oscil v I lations to cbrrespond'withthe voice,--a -priin series and upon op'posite sides of said pri '1.

' mary coil connected witli'said apparatus, an

aerial, and a plurality ofsecondary coils 4. In a high freduency apparatus, 'the combination of'an are lamp, means for supplying said lamp with current, an oscillating circuit connected with the electrodes of-said la'm p,-comprising an inductance and acapacity, means for varying said oscillations,

mounted upon opposite sides of said hollow coil; that is, inside anioutside of said hollow c011.

.5. In a high frequency apparatus, the

combination of means for producing electric oscillations, a primary coil in the form of a solenoid in circuit with sald means, means an aerial, and secondary coils in series and for varying said oscillations, an aerial, and p two secondary coils in series and in circuit wlth said aerial, said secondary coils belng.

in the form of solenoids, one being placed side of said primary coil. p

6. In a high frequency. tuning apparatus, ;the combination of a cylindrical primary, a

-within said primary coil and the other outplurality of cylindrical secondary coils electricall jconnected series vwith each other, one o 7 said coils bein insldeof said prlmary, and the other 0 said coils outside of 4 said primary, and a condenser placed within said coils. p v

7. In a high frequency, apparatus, the. combination of an oscillating circuit having a primary, two secondary coils, one within said primary and the other outside thereof,

said secondaries being in series, and aerial connected to one of said secondaries, a transinitter connected on one ide to saidiaerial circuit at a point remov d from said secondaries, and means for adjustably con'nectingsaid transmittenon the other side-with one of said secondaries, W'hereby a portion. of; said secondaries may-be short-clrcuited.

testimony that I. claim the foregomg' Ihave hereunto set hand. 

